Disk-sharpener



(No Model.)

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Patented Apr. 13, 1897.

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THOMAS L. REGESTER, OF STERLING, ILLINOIS, ASSIGNOR TO TI-IE NOVELTYMANUFACTURING COMPANY, OF ROOK ISLAND, ILLINOIS.

DISKHSHARPENER.

SPECIFICATION forming part of Letters Patent No. 580,465, dated April13, 1897. Application filed February 14, 1896. Serial No. 579,246. (Nomodel.)

T0 all whom, t '17m/y calmer-7i,.-

Be it known that I, THOMAS LYLE Rncns- TER, a citizen of the UnitedStates. residing at Sterling, in the county of lVhiteside and State ofIllinois, have invented certain new and useful Improvements inDisk-Sharpeners; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, which form a part of this specification.

My invention has reference to machines for sharpening disks, and isintended to afford a cheap, convenient, and efficient means forsharpening the cutting edges of disks used in harrows and cultivators ofdifferent forms. It is so constructed that one person may hold thesharpening-knife to the side of the edge of the disk and at the sainetime rotate the latter against the action of said knife.

My invention consists in the mechanism hereinafter described forclamping and rotating a disk and the coincident contact of theparing-knife with the edge of said disk.

I attain the purpose aforesaid by the use of the construction shown inthe accompanying drawings, in which- Figure l is a perspective of amachine embodyin g myinvention, exhibiting a disk in the position ofbeing sharpened. Fig. 2 is a plan view of the plate which supports theoperative parts. Fig. 3 is a horizontal transverse sectional view in theplane of the above-named plate.

Similar letters indicate similar throughout the several views.

A represents the frame of the machine, supported in any proper manner,upon which the plate B is suitably bolted.

O is a shaft journaled transversely in the plate B, and at one side ofthe frame A there is seated on said shaft C a circular metallic plat-eD, having its periphery turned from the frame A to form an annularflange E. A transverse pin F is passed through the shaft C and the hubof the plate D, between the main body of the latter and the plate B. Inthe interval between the plates B and D there is bolted to the latterthe gear G, centered on the shaft C.

parts At one end of the plate B there is also journaled a transverseshaft I-I, provided at one end with the pinion J, adapted to engage andactuate the gear G. The shaft I-I is provided at its opposite end with asuitable crank K. The comparative size of the pinion J and gear G isabout one to iive, but such disparity may be increased or diminished,the purpose being to afford a large leverage advantage in the rotationof the shaft O.

L represents the disk to be sharpened, and is seated on the shaft O,with its concave side in contact with the flange E around the entireperiphery of the latter. A conically-formed collar M is seated on `theshaft O, with its smaller end projected into the central openinginvariably found in the disks L. A threaded nut N, seated on the shaftC, is used to force the collar M into the opening O of the disk, and tothereby not only center said disk upon the shaft O, but to clasp saiddisk against the iiange E aforesaid, so that in the rotation of theplate D the disk L is carried therewith.

On the plate B, oppositely to the shaft H, there is formed a stationaryhandle P and in said plate a slot R. In the slot R is adjustably seatedthe second handle S, which is provided at its opposite extremity withthe knife T, in position to he forced and held against the side of theouter edge of the disk L, so as to pare and thereby thin and sharpen theedge of the latter. The handle S is seated on the slot R by `means of acollar V, the base of which rests upon the plate B at each side of theslot Rand the upper end of which extends laterally over the uppersurface of the handle or lever S as an annular flange WV. A bolt X,passed vertically down through the collar V and provided with a nutagainst the under surface of the plate B, affords means of holding thecollar V at any desired locality on the slot R. The handle `S is looselyseated around the collarV between the iiange W and the plate B, and istherefore free to oscillate, whatever the compression effected by thebolt X. The outer end of the handle S is in such relation to the handleP that the operator may grasp both with one hand and,

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mit said knife to adjust itself to any irregularities in the thicknessof said disk.

lf it is desired. to sharpen the disk also upon the concave side, saiddisk may be seated against the annular ange E, with its convex sidecontiguous thereto, in the same manner as heretofore described inreference to the concave side thereof.

My invention can be very cheaply afforded, is simple in construction,occupies but little room, and requires no special skill in itsoperation. The knife T is adjustably seated in the handle S by theset-screw Z, and by this adjustment and that of the lever or handle S inslot R the machine can be used upon disks of any size. The method ofsharpening by paring off the surface is the onlypracticable one, as tosharpen by grinding is substantially an endless job.

Vhat I claim as my invention, and desire to secure by Letters Patent ofthe United States, is-

l. In a disk-sharpener, the combination, With a plate, one end of whichis provided With means for holding and rotating a disk, and the oppositeend is slotted longitudinally, and provided With a stationary handle, ofa movable handle pivotally secured to the slotted end of the plate, oneend of which lies adjacent to the stationary handle and the opposite endis provided with a knife which is adapted to be pushed against the edgeof the disk, substantially as set forth.

2. In a disk-Sharpener, the combination, with a plate, one end of whichis slotted longitudinally, and the opposite end and the intermediateportion are each provided With a transverse bearing, a shaft in each ofthe bearings, one of which is provided With a crank at one end and agear-pinion at the other, a cup-shaped plate on the inner end of theother shaft, a gear-Wheel upon the plate in engagement with the pinion,means for securing a disk to the outer end of the secondmentioned shaft,and a lever adjustably secured to the slotted end of the plate, one endof which forms a handle, and the opposite end is provided With a knifeadapted to engage with the edge of the disk, substantially as set forth.l

In testimony whereof l affix my signature in presence of two Witnesses.

THOMAS L. REGESTER.

Vitnesses:

JOHN G. MANAI-IAN, ISABELLE MANAHAN.

